Download »Application Notes, PDF, 965 Kb, Rev. B, 05-01-2013AN-29 IC Op Amp Beats FETs on Input Current (Rev. B)This application note describes a monolithic operational amplifier which has input error currents in theorder of 100 pA over a в€’55В°C to 125В°C temperature range. Instead of FETs, the circuit used bipolartransistors with current gains of 5000 so that offset voltage and drift are not degraded. A powerconsumption of 1 mW at low voltage is also featured.A number of novel circuits that make use

Download »Application Notes, PDF, 727 Kb, Rev. C, 05-01-2013AN-20 An Applications Guide for Op Amps (Rev. C)This application note is a guide for Op Amps. The circuits discussed herein are illustrative of the versatilityof the integrated operational amplifier and provide a guide to a number of useful applications. Thecautions noted in each section will show the more common pitfalls encountered in amplifier usage.

Download »Application Notes, PDF, 579 Kb, Rev. B, 05-01-2013AN-4 Monolithic Op AmpвЂ”The Universal Linear Component (Rev. B)Operational amplifiers are undoubtedly the easiest and best way of performing a wide range of linearfunctions from simple amplification to complex analog computation. The cost of monolithic amplifiers isnow less than $2.00, in large quantities, which makes it attractive to design them into circuits where theywould not otherwise be considered. Yet low cost is not the only attraction of monoli

Download »Application Notes, PDF, 370 Kb, Rev. B, 05-01-2013AN-30 Log Converters (Rev. B)One of the most predictable non-linear elements commonly available is the bipolar transistor. Therelationship between collector current and emitter base voltage is precisely logarithmic from currentsbelow one picoamp to currents above one milliamp. Using a matched pair of transistors and integratedcircuit operational amplifiers, it is relatively easy to construct a linear to logarithmic conv

Download »Application Notes, PDF, 1.2 Mb, Rev. A, 09-19-2016Building an Op Amp With Bipolar Transistors, A Historical Application Note (Rev. A)It is well known that the voltage noise of an operational amplifier can be decreased by increasing the emitter currentof the input stage. The signal-to-noise ratio will be improved by the increase of bias, until the base current noise begins to dominate.

Download »Application Notes, PDF, 940 Kb, Rev. B, 05-01-2013AN-79 IC Preamplifier Challenges Choppers on Drift (Rev. B)Since the introduction of monolithic IC amplifiers there has been a continual improvement in DC accuracy.Bias currents have been decreased by 5 orders of magnitude over the past 5 years. Low offset voltagedrift is also necessary in a high accuracy circuits. This is evidenced by the popularity of low drift amplifiertypes as well as the requests for selected low-drift op amps. However, until n

Download »Application Notes, PDF, 1.1 Mb, Rev. B, 05-06-2013AN-262 Applying Dual and Quad FET Op Amps (Rev. B)The availability of dual and quad packaged FET op amps offers the designer all the traditional capabilitiesof FET op amps, including low bias current and speed, and some additional advantages. The cost-peramplifieris lower because of reduced package costs. This means that more amplifiers are available toimplement a function at a given cost, making design easier. At the same time, the availab